Joint-producing machine



I March 11, 1930. J. HELTZEL 1,750,107

JOINT PRODUCING MACHINE Filed April 26, 1929 s Sheets-Sheet 1 Fllll- March 11, 1930. N, HELTZEL 1,750,107

JOINT PRODUCING MACHINE Filed April 26, 1929 3 Sheets-Sheet 2 Claim my,

March 11, 1930. J. N. HELTZEL JOINT PRODUCING MACHINE Filed April 26, 1929 3 Sheets-Sheet 3 Patented Mar. 11, 1930 PATENT OFFICE JOHN N. HEL'I'ZEL,

OF WARREN, OHIO JOINT-PRODUCING mounts Application filed April 26, 1929,

The present invention .relates to joint machines, for installing joints in concrete roads, pavements, and the like, and the invention aims' to provide a novel and improved ma- 6 chine ofthat kind.

Another object of the invention is the provision of a joint machine comprising joint installin means movably mounted on a carriage to e moved along a predetermined line for'producin the joint.

'With the %ore oing and other objects in view, which will e apparent as the description proceeds, the invention resides in the construction and arrangement of parts, as

1 hereinafter described and claimed, it being understood that changes can be made within the scope of what is claimed, without departing from the spirit of the invention.

. The invention is illustrated in the accompanying drawings wherein- Figure 1 is a plan view of the lmproved machine.

. Fig. 2 is an enlarged cross section on the line 2-2 of Fig. 1.

Fig. 3 is a vertical section on the line 3-3 of Fig. 2.

Fi s. 4 to 8, inclusive, are cross sectional detai s showing the steps in the building of the joint.

Flg. 9 is a cross sectional detail illustrating a modified form of joint.

Fig. 10 is a cross sectional detail illustrating a modified form of device for producing the roove or cleft in the plastic concrete.

Fig. 11 is a' perspective view of the blade or tool shown in Fig. 10.

Fig. 12 is an end view of a modified form of groovin device, showing the guide rail of the carriage in cross section.

Fig. 13 is a side elevation of the device shown in Fig. 12. I Fi 14 is an end view of another modification 1n the grooving device.

Fig. 15 is a side elevation thereof.

The machine comprises a suitable carriage orbridge 1 having the wheels 2 to move on the side forms or rails 3 between which the road or avement is built, and said carriage has para llel lon tudinal rails 4 disposed at opposite sides 0 the line of the joint.

Serial No. 358,330.

The carria e also has platforms 5 at the outer sideso the rails 4, and transverse platforms 6 on which the workmen may be sup ported while building the joint.

A secondary carriage 7 is mounted on the mam carriage or frame, and has the transverse axles 8 on which wheels 9 are adjustable transversely, said wheels rolling on the rails 4.

In order to hold the carriage 7 down on the rails, it has hangers 10 provided with rollers 11 moving under flanges 12 of the rails 4, thereby preventmg the carriage 7 from tipp1ng or raising oil the rails 4.

The joint installer or grooving device comprlses a trowel or plate 13 having an upturned margin, and a groovin blade 14 depends from the plate 13 to form t e groove in the plastic concrete. The plate 13 has upstandin stems 15 and 16 slidable in the carriage 7 an coiled sprm s 17 surround said stem and are confined tween said carriage 7 and nuts 18 adustable on the stems, in order that the springs Wlll carry the weight of the late 13 and sleeve 14 and to lift them, when ree, from the concre The rear stem 16 has a handle 19 at its u per end to be conveniently grasped by t e Workman for reciprocating the carriage 7 and depressing the rear portion of the grooving device.

A lever 20 is pivoted on the frame of the carriage 7 and has a cam 21 seating on a head 22 with which the forward stem 15 is pro- .vided, for depressing said stem. A rod 23 is connected to the lever- 20 and extends rearwardly over the handle 19 in order that the lever 20 may be conveniently operated.

In forming the groove the carriage 7 is reciprocated on the rails 4, with the blade 14 depressed into the-plastic concrete. The forward and backward motion of the blade will provide momentum to force the forward end of the blade into the material, and the trowel or plate 13 smooths the surface of the mater1a at the opposite sides of the groove.

The trowel 13 and blade 14 may be vibrated in order to more effectively enable the blade to cut into the plastic concrete. This vibratory motion of the blade is conveniently September 30, 1927.

The cement and sand ma produced by an en ine 24 mounted on the trowel 13 and hav ng an unbalanced flywheel.

The grooving device is reciprocated while 5 the mam carriage or frame 1 is stationary,

and said carriage 1 may be advanced as the groove is completed between the rails 4.

The ste s in the method of installing the joint are s own in Figs.'4 to 8 copending app ications Serial No. 6,806, filed Feb. 4, 1925, Serial No. 24,801, filed April 21, 1925 and Serial No. 223,161, filed This preliminary groove is produced first while the material is poured and finished or shortly thereafter, so as to separate the stones, broken rock or coarser aggregate along the line of the joint. flow back into the groove, as seen at 26 in Fig. 5, but the coarser a gate remains separated.

Th e blade 14 subsequently reopens the groove by displacing thecfiner material, the coarser aggregate previously having been displaced so as not to interfere with the movement of the blade 14. i

The reenforcing or transverse tie rods 2 are below the roove 25, and may be forced down when said oove is formed. The blade on the road finis in machine (not shown) which first forms t e groove or which divides the coarser ag regate may depress the reenforcement or roc ls 27 as well as deflectin the coarser aggregate to op osite sides.

hen the groove is reopened y the blade 14 a form 28 ma be inserted in the groove, as seen in Fig. to hold the groove 0 11 while the concrete sets, and may be su equently removed to fill the groove wlth tar, asphalt or other sealin materlal, as seen at 29 in Fig. 8. It is a 0 possible insert 'oint strips into the oove, which str1 s may be of metal, premol ed material, or t e like. F i 9 illustrates a premolded strip 29 of as alt or other composition.

en operating the blade 14 to reopen the groove, the handle 19 ma be de resse to dere'ss the rear end of t e bl orward end thereof is raised, which is desirable when the concrete is set slightly. If it isdesired to lace additional pressure on the forward end of the blade, the cam 21 is turned to de ress the forward end of the blade. The vibratory means or engine 24 is of especial advantage when working in semlset or partially hardened concrete.

When the concreteis of the ri ht conslstency, the joint form or plate 28 1g. 7) w1ll not be required for producing an open ]o1nt or groove, said form only being used when the material is too soft or plastic or when weather conditions are such that the setting of the concrete is slowed down. In extreme- 66 1y hot weather. or when mixtures are used to inclusive. A' 10 groove 25 is first produced in the plastic concrete, such as b the means disclosed in my 0, while the produce a quick setting of the concrete, then the open groove roduced by the blade 14 will remain open wit out using the form 28.

Fi 10 and 11 illustrates a simple groov- 1n e vice or tool having the blade 14 movabi between parallel rails 4' to reopen the groove or to produce a cleft in the plastic concrete. The blade has a handle 19' and has rollers 9' to move on the rails 4, so that the tool may be conveniently reciprocated by hand to form orreopen the groove.

Figs. 12 and 13 illustrate a modification wherein a single rail 4 is used for guiding the carria e 7. The rail is of I-section as shown, an the wheels 9' of the carriage move on one flange of the rail. The carriage has rollers 11' engaging under the rail to hold the carriage on the rail.

The trowel or plate 13 is suspended from the carriage and has the blade 14, and a handle 19' is pivoted to said trowel for reciprocating same conveniently from the workmans platform 5. The rail 4 may be adjustable transversely and vertically in order to properly position the tool.

Figs. 14 and 15 illustrate another modification, wherein the carriage 7 has wheels 9 moving on the rail 4* and wheels or rollers 11' moving under said rail. Vertical screws 21 are mounted on the carriage 7 b for adjusting bearings 22 verticall and arms 15 are hingedly connected with said bearings and have slots receiving clamping bolts or elements 31 which fasten the trowel 13 to said arms, thereb permitting of transverse adjustment of t etrowel 13 and blade 14 with respect to the rail 4".

The bearings 22 may be adjusted vertically by rotating the screws 21 in order to properlylgosition the trowel on the plastic concrete.

handle 19 is pivotally connected to the trowel 13? for conveniently reciprocating same.

Havin thus described the invention, what is claime as new is:

1. A joint machine comprising a carriage movable longitudinally over plastic concrete, joint producing means, and means supporting said means from the carriage for movement longitudinally of the carriage in the same direction that the carriage is movable.

2. A joint machine comprising a carriage movable lon 'tudinally over lastic concrete and having ongitudinal guiding means extending parallel to the direction of movement of the carriage, and joint producing means movable along said guiding means.

3. A joint machine comprising a carriage movable longitudinally over plastic concrete and having a longitudinal rail extending parallel to the direction of movement of the carriage, and joint producing means movable along said ra1l.

4. A joint machine comprising a carriage and a joint producing tool mounted for reciprocatory movement on the carriage in the movement of the carriage, and joint producsame direction that the carriage 1s movable mg means movable between said rails.

and having a trowel and a depending blade.

In testimony whereof I hereunto afiix my 5. A joint machine comprising a carriage, signature.

a joint producing tool mounted for reciproca tory movement on the carriage in the same direction that the carriage is movable and having a trowel and a depending blade, and means for vibrating said tool.

6. A joint machine comprising a carriage, a guide supported by the carriage and extending parallel to the direction of movement of the carriage, a joint producing blade, and means supporting said blade for movement from said guide.

7. A joint machine comprising a carriage, a guide supported by the carriage and extending parallel to the direction of movement of the carriage, a joint producing blade, and means adjustably supporting said blade from said guide for movement along the guide.

,8. A joint machine comprising a carriage, a secondary carriage mounted for movement thereon in the same direction that the first named carriage is movable, a joint producing tool, and means supporting said tool from the secondary guide for vertical movement.

9. A joint machine comprising a carriage, a secondary carriage mounted for movement thereon in the same direction that the first named carriage is movable, a joint producing tool connected with the secondary carriage for vertical movement, and means for depressing said tool.

10. A joint machine comprising a carriage, a secondary carriage mounted for movement thereon in the same direction that the first named carriage is movable, a joint producing tool connected With the secondary carriage for vertical movement, spring means on the secondary carriage for yieldingly raising the tool, and means for depressing said tool.

11. A joint machine comprising a carriage, a secondary carriage mounted for movement thereon in the same direction that the first named carriage is movable, a joint producing tool having forward and rear upstanding stems slidable in the secondary carriage, and individual means for depressing either stem.

12. A joint machine comprising a carriage, a joint producing tool having forward and rear upstanding stems slidable in the carriage, spring means on the carriage for yieldably raising each stem, and individual means for depressing either stem.

13. A joint machine comprising a carriage having a guide arranged parallel to the line of movement of the carriage, a joint producing tool supported for movement from said guide, and a handle connected to said tool.

14. A joint machine comprising a carriage movable longitudinally over a road under construction and having spaced parallel longitudinal rails parallel to the direction of 

